package com.qf.util;

import lombok.Data;

import java.util.List;

@Data
public class PageInfo<DD> {

    //1. 当前页.
    private Integer page;
    //2. 每页显示条数.
    private Integer size;
    //3. 数据的总条数.
    private Integer count;
    //4. 数据的总页数.
    private Integer pages;
    //5. 起始索引.
    private Integer offset;
    //6. 具体的数据
    private List<DD> list;


    public PageInfo(Integer page, Integer size, Integer count) {
        this.page = page < 1 ? 1 : page;
        this.size = size < 1 ? 5 : size;
        this.count = count;
        this.pages = (int)(Math.ceil(this.count * 1.0 / this.size));
        this.offset = (this.page - 1) * this.size ;
    }
}
